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3 Sheet-Slieet 1.

(No Model.)

G M. ANDERSSON GBNTRIPUG-AL APPARATUS.

No. 555,893. Patented Mar. 3,1896.

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r A TTORNE PS- '1 (No Model.) 3 Sheets-Sheet 2.

G. M. ANDER8SON. GENTRIFUGAL APPARATUS.

No. 555,893. Patented Mar. 3, 1896.

' A TTORNEYZ? (No Model.) 3 Sheets-Sheet a.

G. M; ANDBRSSON. GENTRIFUGAL APPARATUS.

No. 555,893. Patented Mar. 3,1896.

WITNESSES IN VENT 0R lhviTEn STATES PATENT OFFICE.

GUSTAF M. ANDERSSON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HENNING G. TAUB1, OF SAME PLACE.

APPARATUS.

SPECIFICATION forming part of Letters Patent No. 555,893, dated March 3,1896.

Application filed September 19, 1892.

To all whom it may concern:

Be it known that I, GUSTAF M. ANDERssoN, a subject of the King of Swedenand Norway, and a resident of Newark, in the county of Essex, State ofNew Jersey, have invented certain new and useful Improvements inCentrifugal Separating Apparatus, of which the following is aspecification, reference being had to the accompanying drawings, formingpart hereof. 1

This invention relates generally to centrifugal apparatus for separatingsubstances of different specific gravities, but it is more especiallydesigned for centrifugal cream-sepa rators and centrifugalbutter-extractors.

It has for its object to secure a delicate adjustment of a fluid-outletfrom the drum or from a chamber of the separatingdrum.

In the accompanying drawings, Figure 1 is a plan view of a centrifugalbutter-extractor. Fig. 2 is a vertical section of the same on the line 22, Fig. 1. Fig. 3 isa vertical section on the same line, but looking inopposite di rection. Fig. 4 is a horizontal section on the line 4 4,Figs. 2 and 3. Fig. 5 is adetail perspective of the adjustable outlet.Fig. 6 is a detached perspective of the cream-disturber. Fig. 7 is avertical central section of a centrifugal separator, showing myimprovements applied thereto.

The apparatus shown in the drawings is especially adapted forhand-operated buttercxtractors and cream-separators, and to that end thevarious parts are of simple compact construction and are especiallylight running, so that there is but slight friction and therefore littlewaste of power in the operation of the machine.

The drawings do not show the lower parts of the apparatus nor thebearings for the centrifugal drum, as these parts are of ordinaryconstruction and well understood in the art.

The centrifugal drum or bowl is incased byaflxed casingb, provided witha removable cover I). The operating-shaft c is arranged vertically androtatively mounted in bearings of usual construction, and the separatingdrum or bowl a is mounted upon the upper end of this operatingshaft o.In the operation of the machine this drum is revolved at Serial No.446,248. (No model.)

the rate of from six thousand to eight thousand revolutions per minute.

The mixed substances to be separated must be fed into the machine in asubstantially fluid condition, and are preferably supplied in acontinuous but regulated stream from the vessel e, mounted upon thecover I) and provided with a downwardly-projecting pipe or feed-tube f.This feed-tube extends down into the receiving-chamber or spread-cup gof the separating-drum, provided with radial outlets or tubes g, whichextend into the main separating-chamber of the drum.

fis the feed-tube through which milk is supplied to the bowl to from thereservoir 6. 6 5

h is the color-cup for supplying coloring matter for the butter and isadjustably mounted in a screw-threaded bearing in the vessel 6 and has adownwardly-extending tube 7'1. entering the feed-tube f. The lower endof the tube It is conical, as preferably is also the lower end of thefeed-tube f, and the tube h is therefore adapted to act as a stopper forthe feed-tube f, and by its position in the feed-tube regulates theamount of opening or the size of the passage for the fluid supplied tothe separating-drum.

The adjustment of the adjustable sliding plug 7L2 determines the amountof coloring material fed into the extractor, and the adj ustment of thecolor-cup as a whole determines the amount of milk fed into theextractor.

WVithin the main chamber of the drum radial blades 't' i of ordinaryconstruction are 8 5 provided to compel the fluid to partake of therotation of the drum. The outlets from the main separating-chamber forthe heavier material are tubes j, extending from the outer periphery ofthe separating-drum to a point go quite near the axis of theseparating-drum, and there connected withthe inclined cylindricalopenings The outlet for the lighter fluid is an adjustable plug a,rotatively mounted in an opening in the upper Wall of 5 the mainseparating-chamber of the drum and preferably screw-threaded exteriorly.This outlet-plug is pierced eccentrically, so that when this outlet-plugis turned the ori fice will be moved toward or from the axis of theseparating-drum. The orifice is preferably rectangular in cross-section,so that the plug may be turned by inserting a suitable key or wrench insaid orifice a.

The outlet-plug a is located at a distance from the axis of the drumcorresponding very nearly with the radius of the inner wall of the fluidwithin the drum during the operation of the drum. The intensecentrifugal force resulting from the rapid revolution of the drum causesthe separation of the particles of the fluid and a rearrangement of theparticles according to their specific gravity, the heavier particlesarranging themselves near the periphery of the drum and the lighterparticles arranging themselves nearest the axis of the drum. Now theposition of the outlet at for the lighter particles determines thedensity of the lighter fluid that passes out through such outlet a, forthe reason that the outlet for the heavier fluids is fixed, and therelative positions of these two outlets determine through theequilibrium of the fluids the density of the fluid which will flow outthrough the outlet a. As the fluid supplied to the separating-drum isnot always of the same consistency, it becomes necessary at vario ustimes to slightly adjust the outlet a, even when the device is alwaysused upon the same character of material, as well as to initiallydelicately adjust the outlet. This is well illustrated incream-separating and butter extraction, Where the milk supplied to themachine is of varying densities and is especially changed by the changeof locality, so that each machine has to be adjusted to the character ofcream supplied at the locality in which it is used. It is thereforequite desirable to have a fine adjustment, such as is provided by myeccentrically-pierced plug a, in order to adapt the machine to theproduction of a uniform quality of butter or cream.

In the construction shown in Fig. 7, where my invention is applied to acentrifugal cream-separating device, the drum has but oneseparating-chamber, and the cream-outlet plug a is arranged at the upperpart of the drum, and the cream escapes from this outlet and is thrownoutward into a receiving-pan 70. This construction is also adapted forthe separation of other substances than cream and milk, and is in fact acentrifugal separating apparatus of general utility. hen, however, myinvention is to be applied to butter extraction, additional devices arenecessary to separate out the last particles of blue milk, and thuseitectually separate the butter-fat from the blue milk, and one or moreadditional chambers are provided in which this operation is effected.This construction is shown in Figs. 1 to 6, inclusive. These devices forextractin g butter form no part of my present invention. Any suitableapparatus for extracting butter may be used in their place. They are,however, shown in the drawings, and will be now described so as toclearly show one manner of using my improved eccentricallypiercedscrew-plug with butter-extracting devices. Two chambers are provided inthe upper part of the separating-drum. The lower chamber, Z, receivesthe cream from the creamoutlet a. Vithin this chamber is arranged thecream-disturber, consisting of the stationary comb or pins m, mountedupon the stud m and arranged to extend within the cham ber so that theirends will enter the inner layer or wall of lighter material within thechamber Z. The stud m is rotatively adjustable and is mounted in the topor cover I) of the casing, and is adjusted by means of the handle anadapted to be clamped in desired position, and is partly hollow, and hasa tube or spout m projecting into the upper chamberm, of theseparating-drum. This upper chamber, 11, is placed just above thechamber Z and receives the butter from such chamber Z. By means of thetube or spout m water or other lubricating fluid is supplied to thisupper chamber, at, and floats the butter particles i11- Ward in positionto be removed from the machine by the butter-knife. This butter-knife 0is adj ustably mounted in the top or cover Z) of the casin g andprojects downward into the upper chamber, at, of the drum. The operationof this butter-knife is to cut out or scoop out the butter from theinner layer within the chamber a.

A drip-pan p is mounted in the upper part of the casing to receive anyfluid which may perchance flow over the top of the drum. A suitablevessel would also be, provided or formed by the casing for receiving theblue milk from the outlet-orifices j, but such device is not shown, asit is of usual and wellknown construction.

The apparatus shown in the drawings is convertible-that is to say, thesame frame and separating-drum is adapted, with a slight change of otherparts, to operate both as a butterextractor and as a separator. Thechange from one form of machine to the other is readily and easilyeffected.

Figs. 1 to 6 show the apparatus arranged for butter extraction, and Fig.7 shows the apparatus arranged for simple separation. The removal of thecover I) and attached parts, including the drip-pan p, the vessel (2,tube f, and the separating-combs m and stud, and of the upper revolvingpiece containing the chambers n and l, and spread-cup g and theoutlet-orifice a, removes all the parts of the machine that are peculiarto the butterextracting operation. The removal of these parts havingbeen effected,the cap q is screwed upon the separating-drum and thecoverr is placed over the top of the frame I), and thereby the machineis prepared for the operation of separating cream from milk or ofseparating other mixed substances. A suitable reservoir or vessel 6forms part of the cover 0', and a suitable receiving-vessel 70 alsoforms part thereof A feed-tube f extends downward from the bottom of thevessel 6 into a receiving-chamber or spread-cup formed in the cap g.This spread-cup is similar in construction to the spread-cup g of thebutterextracting cap, but somewhat modified by reason of the difierentshape of cap. 9 are the tubes extending from such cup into the mainchamber of the drum.

An adjustable plug a, provided with an outlet-orifice a, is exactly ofthe same construction as that heretofore described and mounted Withinthe top of the cap.

The i'eed-tube, color-cup, and its downwardly-extending tube,tl1eadjustable sliding plug, and the butter-extracting devices shown anddescribed form no part of my presentinvention, but are to be claimed inanother application about to be filed by me.

What I claim, and desire to secure by Let ters Patent, is-- 1. In acentrifugal separator, the combination with the separator-drum of aneccentrically pierced rotatable plug fitted in the Walls of aseparating-chamber of said drum and so arranged that the rotation ofsaid plug adjusts the distance from the axis of the drum to saideccentric opening, substantially as set forth.

2. In a centrifugal separator, the combination with the separator-drumof the rotatable screw-plug a, having the eccentric orifice a formedtherein and fitted in the Walls of a separatingchamber of said drum,substantially as set forth.

GUSTAF M. ANDERSSON.

\Vitnesses:

HENNING G. TAUBE, GrrAs. W. MARSHALL.

